The Placenta Allows Exchange of Oxygen,nutrients,and Waste Products Between the Mother

The placenta allows exchange of oxygen,nutrients,and waste products between the mother and fetus by:

A) contact between maternal blood and fetal capillaries within the chorionic villi.
B) interaction of maternal and fetal pH levels within the endometrial vessels.
C) a mixture of maternal and fetal blood within the intervillous spaces.
D) passive diffusion of maternal carbon dioxide and oxygen into the fetal capillaries.

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